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import imp
import unittest
from test import support
class LockTests(unittest.TestCase):
"""Very basic test of import lock functions."""
def verify_lock_state(self, expected):
self.failUnlessEqual(imp.lock_held(), expected,
"expected imp.lock_held() to be %r" % expected)
def testLock(self):
LOOPS = 50
# The import lock may already be held, e.g. if the test suite is run
# via "import test.autotest".
lock_held_at_start = imp.lock_held()
self.verify_lock_state(lock_held_at_start)
for i in range(LOOPS):
imp.acquire_lock()
self.verify_lock_state(True)
for i in range(LOOPS):
imp.release_lock()
# The original state should be restored now.
self.verify_lock_state(lock_held_at_start)
if not lock_held_at_start:
try:
imp.release_lock()
except RuntimeError:
pass
else:
self.fail("release_lock() without lock should raise "
"RuntimeError")
class ImportTests(unittest.TestCase):
def test_find_module_encoding(self):
fd = imp.find_module("heapq")[0]
self.assertEqual(fd.encoding, "iso-8859-1")
def test_issue1267(self):
fp, filename, info = imp.find_module("pydoc")
self.assertNotEqual(fp, None)
self.assertEqual(fp.encoding, "iso-8859-1")
self.assertEqual(fp.tell(), 0)
self.assertEqual(fp.readline(), '#!/usr/bin/env python\n')
fp.close()
fp, filename, info = imp.find_module("tokenize")
self.assertNotEqual(fp, None)
self.assertEqual(fp.encoding, "utf-8")
self.assertEqual(fp.tell(), 0)
self.assertEqual(fp.readline(),
'"""Tokenization help for Python programs.\n')
fp.close()
def test_reload(self):
import marshal
imp.reload(marshal)
import string
imp.reload(string)
## import sys
## self.assertRaises(ImportError, reload, sys)
def test_main():
support.run_unittest(
LockTests,
ImportTests,
)
if __name__ == "__main__":
test_main()
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